Machine-tool attachment



Aug. 28, 1951 s, F, SNDULA 2,566,145

l MACHINE TOOL ATTACHMENT Filed Oct. 5, 1946 INVENTOR.

fzzzfzzmda@ BW? Patented ug. 28, F19,511

UNITED STATES PATENT OFFICE MACHINE-TGOL ATTACHMENT yStanley F. Sandula, Chicago, Ill.

Application October 3, 1946, Serial No. 700,851

The present invention relates to drills, reamers or like machine tools, and has for its principal object the provision of means for attaching bushings to drills or like machine tools.

In tool machines the tool is usually passed through a bushing supported within a fixture. When a drill is withdrawn from the machine, the bushing must also be withdrawn when a tool' of different diameter is to be used. This requires two separate manual operations. present invention contemplates the provision of suitable connecting means between the tool and the bushing in order that the two may be simultaneously handled while removing the same from the machine, thereby saving time, and which connecting means may not detract from a normal function of the tool.

With the above general objects in view and others that will appear as the invention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawing and pointed out in the appended claims.

In the drawing forming a part of this application, and in which like designating characters refer to corresponding parts throughout the several views:

Fig. 1 is a side elevational View of the drill, with a bushing through which the drill is passed in an operative position, the bushing being partly in section, with the connecting device between the drill and the bushing in the operative position; and

Fig. 2 is an enlarged cross-sectional view through a bearing member which supports and engages the tool.

Referring to the present drawing in detail there is shown drill 3 engaged at its upper end by chuck 4. Bushing 5, including flanged head 5, is passed through fixture 'l wherein it is normally supported. Bushing 5 has central bore through which drill 3 is passed. Fixture 1 has downwardly depending wall 8 which integrally connects with base 9 on which work Ill is supported. All the above parts are known in the art.

When drill 3 is withdrawn from bushing 5, the

latter must also be withdrawn from fixture l` and a bushing having a bore of a diameter corresponding to that of a different tool must be substituted, when a tool of a different diameter is required for use.

The present invention contemplates connecting The I 5 Claims. (Cl. 77-55) tool, so that the two may be simultaneously placed into or withdrawn from the machine.

Inwardly threaded ring II is provided with an annular flangev I2 through which bushing 5 extends and upon which head E rests. Connected in a threaded relation with said ring II is cap I3, which by its horizontal portion overllies said head 5 and by its vertical annular portion extends to and contacts with said fiange I2. Thus, ring Il, flange I2 and cap I3 constitute a housing within which head 6 is receivable in a clamped position, and from which bushing 5 may be disconnected and other bushings interchangeably substituted. Said cap I3 at its horizontal portion is provided with the central opening, in alinement with the bore in bushing 5, through which drill 3 extends. Said opening may be of a diameter larger than said bore in bushing 5 so that tools of various diameters may be extended therethrough.

Attached to said cap I3 by its embedded Vertical end stem I4 is a helical coil spring I5, which on vertical plane is of substantially circular formation.

Cooperating with the shank of drill 3 and dis` posed above bushing 5 is sleeve I6, provided at its lower endwith an integrally formed annular flange I1, through which set screw I8 is passed for engaging drill 3 and keying the same to said sleeve I6.

integrally formed with the upper end of sleeve I6 is an inner race I9. Encompassing said race I9 in a spaced relation is ring 20 provided with outer race 2I on its inner face. Both said races I9 and ZI are provided with opposed arcuate grooves within which a ball-bearing of a pluralityof spaced balls 22 is positioned. Annular rings 23 positioned between races I9 and 2l, provided with spacing depressions, maintain said balls 22 in mutual spaced relation.

Helica1 groove 24, made on the outer face of ring 2|) receives the coil of the upper end of spring I5 wherein the same is maintained in a frictional engagement with said ring 2U. Thus, said spring is simply slipped on or from said groove 24 when it is desired to connect with or disconnect the same from said ring 20.

From the hereinabove description it will be seen that sleeve I6. flange I1 and race I9 all rotate with drill 3 during the operation of the latter, due to the rigid engagement thereof with said drill 3 through set screw IB. Race I9 rotates within ring 20, being guided in its rotary means between the bushing and the machine movement by balls 22. During the rotation of 3 drill 3 ring 20, spring l5 and bushing 5 remain stationary.

When drill 3 is disengaged from chuck 4, the former may then be withdrawn from fixture 1, simultaneously with bushing 5, because the latter is connected with said drill 3 through spring l5 and ring 20. This saves time for the operator, because otherwise the operator would have to remove separately the drill and then the bushing.` i v It is furtherY observed' that during the operative position of drill 3 bushing 5 is supported by and upon xture l. During the operation of drill 3 bushing 5, ring I I, flange l2, cap |3,spring l5 and ring 2U remain stationary. lOnly drill `3 and sleeve It with flange il and :race i9, the latter three constituting a bearing, rotate with said drill 3. During the downward 'shifting movement of drill 3, as boring operationlin work l progresses, spring l5 gradually compresses,

Aandfgdueto the construction of said `spring l5 hereinabove described the` same may be compressed to themaximum extent, thatisuntil Vthe strands of vsaidY springy l5 are brought -into armutual contact. Y .v

lWhile there is described herein preferred embodiments of the present invention, it is .never- ,thelesspto be ,understood lthat minor changes vmay be made therein `without departing from the -spirit and iscope of the invention as claimed.

, WhatgI claim as new is:

11.1In -a machineA tool attachment, a Yguide `member provided with a borel foriguiding adrill orlike tool having va-shank thereon, a .bearing carried upon the shank oi said drill -Aorlike tool,

clamping means provided onl said bearing for lockingthe bearing vto'said shank, an.antii'ric tion member .within which said bearing iev-posi- V-tioned for rotary movement, and a-coil 'spring connecting said guide member fand said antifriction member and constituting thesol-e con- '.nection therebetween whereby saidlguidednember may be Vsimultaneously removed with-the drill or like tool from the machine, said coil spring beingfrinangencompassing relation with thedrill carried upon the shank of the drill or liketool,

clamping means provided on saidbearing for -locking ,the bearing to said shank, an anti-.fricn tion .ring encompassing saidbearing, said antiiriction ring. permitting rotary movement of said bearing therewithin but preventing Vshifting movement thereof vinto'the longitudinal'direc-` tion with relation to the shank of 'the 'drill or` like tool,"'and a coil spring encompassing therdrill'for Ylike tool and `connecting saidY guidememberi and saidanti-ffri'ction ring and constituting thejsole connection therebetween for permitting 'removal ofsaid guide member from 4the machine simulftaneously with the drill or like tool. Y

3. In a machine tool attachment, :a vguide member provided witha bore forguiding a drill or.like^too1 having a shankathereon, abearing carried 4upon ,the shankfof the drill Yor like itool, clamping means provided oni-said bearing-for adjustably locking the bearing to said shank, an anti-friction ring encompassing said bearing,

said anti-frictionring permitting rotary movement of said bearing therewithin but preventing shifting movement thereof into the longitudinal direction With relation to the shank of the drill or like tool, and a coil spring encompassing the drill or like tool and connecting said guide member and said anti-friction ring for permitting removal of said guide member from the machine simultaneously with the drill or like tool, said anti-friction ring being provided on its periphery with a-helical` groove whereinto one end of said coilspringlmaybe slipped for rictionalf engagement with said anti-friction ring.

14. In a machine tool attachment, a bushing provided with a bore for guiding a drill or like tool having a shank thereon, a flanged head carried by one :end of said bushing, a housing member releasably engaging said iianged head, a bearing carried upon the shank of the drill or like tool in a longitudinally adjusted relation therewith, means for detachably clamping said bearing to vsaid shank, an anti-friction ringencompassin-g said bearing, said anti-friction ring vpermitting rotary movement of said bearing tlierevvtl'iin4 but preventing shiftingmovement `thereof into longitudinal direction with relation to theshank of the drill or like tool, and acoil spring encompassing the drill or like tool and connecting said housing member and said antiriction ringf for `permitting removal of said bushing fromrthe machine `simultaneously with vthe drillorlike tool,.said anti-friction ring being lprovidedon itsperiphery with a helicalgroove `wherein-one end of said coil spring may be positionedfor frictional engagement with said antiiriction ring.

5. In a machine tool attachment, .a .guide member provided with abore forguiding a drill or.a like tool,having ashank thereon,.a bearing carriedrupon the shankrof ,the said drill or like clamping means ,provided on said bearing for locking ther bearing to said'shank, an antifric- -tionmember within which said bearing Vis positioned `for rotary movement, said bearing and anti-friction member being connected to each other so that there is no relative axial movement .therebetween and resilient means connecting saidvguide member andsaid antifriction member and constituting the vsole connection therebetween whereby said guide member'may'be si- ;multaneously removed with the drill orliketool jfromcthe machine.

STANLEY F. 'SANDULA V-ItEIflZIRENCFS CITED Y The following referencesare of record inithe Aille of this ,patenti UNITED STATES PATENTS Germany Mar. 2, `*193,2 

